PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 303 



in length of body, and the length of the pectoral, 5 times. When ex- 

 tended, the pectoral reaches the 11th or 12th scale of the lateral line. 



The distance of the ventral from the snout equals 3 J times the length 

 of the ventral. 



Radial formula : D. II, 11; A. II, 6; C. 18 (developed rays); P. I, 

 16-17; V. I, 8. Scales 6^44-6^. 



Colors : Upper portion light brown (in the alcohohc specimens), lower 

 parts yellowish; some scales on the sides of the body are hght brown 

 at the base, in which respect the species resembles one of the Varieties 

 of M. macrolepidota. The ventrals and the right pectoral of specimen 

 23120 have dark blotches on their lower surfaces, the ventral of the 

 right side being almost banded. The right pectoral and the left ventral 

 of specimen 23121 bear fewer similar blotches. The belHes of both 

 specimens have several markings of the same kind. 



Table of measurements. 

 Species: Myxostoma austrinum Bean. 



Cnrrent number of specimen . 

 Collector's number 



Length to origin of middle candal rays 



Body: 



Greatest height 



Greatest width 



Height at ventrals 



Least height of tail 



Length of caudal peduncle 



Head: 



Greatest length ; 



Distance ftom snout to nape 



I jreatest width 



Width of intororbital area 



Length of snout 



Length of operculum 



Distance from snout to orbit 



Diameter of orbit 



Dorsal : 



Distance from snout 



Length of base 



Length of longest ray 



Length of last ray .' 



Anal: 



Distance from snout 



Length of base 



Length of longest ray 



Length of last ray 



Caudal : 



Length of middle rays 



Length of external rays 



Pectoral': 



Distance from snout 



Length 



Ventral: 



Distance from snout 



Length 



Branchiostegals 



Dorsal 



Anal 



Caudal 



Pectoral 



Ventral 



Number of scales in lateral line 



Number of transverse rows above lateral line. 

 Number of transverse rows below lateral line. 



23120. 

 1. 



23121. 

 L 



Milli- 

 meters. 



303 



n.n 

 n,6 



+ 18 + 



1,17 



1,8 



44 



6i 



64 



lOOths of 

 length 



■without 

 caud<al. 



27 

 15.5 

 24.5 

 9.5 

 15.5 



23 

 18 

 15 



9.5 



9.5 



7 



9.5 



4 



45.5 

 15.5 

 16 

 8 



80 



9 

 22 



9.5 



13 



22 



25 

 21 



62 



15 



Milli. 

 meters. 



285 



m 



n,ii 



n,6 



+ 18 + 



1,16 



1,8 



44 



6i 



6i 



lOOths of 

 length 



without 

 caudal. 



24 



16.5 



2L5 



10 



13 



24.3 



17 



15 



9.6 



9 



7.5 



9.5 



4 



45 



15 



16 



8 



81 

 8.5 

 22 

 10 



13 

 22.5 



25.5 

 19 



54 

 154 



